to speak vaingloriously of; boast of: to vaunt one's achievements.
verb (used without object)
2.
to speak boastfully; brag.
noun
3.
a boastful action or utterance.
Origin: 1350–1400;Middle Englishvaunten < Middle Frenchvanter to boast < Late Latinvānitāre, frequentative of *vānāre, derivative of Latinvānusvain. See vanity
mid-14c., from M.Fr. vanter "to praise, speak highly of," from L.L. vanitare "to boast," frequentative of L. vanare "to utter empty words," from vanus "idle, empty" (see vain).